Hydraulic pump jack for wells



Sept. 18, 1934. R.

HYDRAULIC PUMP JACK FOR WELLS Filed Dec. 15, 1932 3 Sheets-Sheet 1 Sept. 18, 1934. R D. H|LL 1,974,155

HYDRAULIC PUMP JACK FOR WELLS Filed Dec. 15. 1932 3 Sheets-Sheet 2 IIIIII I II I III III/IT III (1 I xxx Sept. 18, 1934. R. D. HILL HYDRAULIC PUMP JACK FOR WELLS Filed Dec. 15, 1932 3 Sheets-Sheet 3 (UH/0W lQ/c/xard D. 2597/ WWW "90 ct repair and trouble.

' .46 constructed in rum? PATE N T OFF-ICE ,Jacx Fox warns mm 1;. mg. rm Worth. Tex. assignor of onebaubl- Dulaney llrdmore. Okla... and

, one-eighth to Fleldon one'eighth .to L- 0.' Dulaney, allol one lourth to 0. I.

-.Andcuon.IowaPar-t'.1' m Application sweets 15, less. se ial No. 041,842 isolating. (CL EH) This invention relates to new-.and'useiui im-v movements in hydraulic pump Jacks for, wells.- One object o! the invention is to provlde'an improved hydraulic pump lack. which maybe s conveniently and readily arranged at .a well to transmit motion fromthe pull rod of a pumping power to-the pump rods in the well. whereby the well is pumped.

Another object 01 the invention is to provide a hydraulic pump Jack of, a simple, economical and durable construction, as well as one which will be compactand tree from superfluousfand obtrusive parta'thusmakins for easy installation and a clean-cut'apparatus requiringa minimum is maintenance.

. A particular objectorthe invention is to eliminate thestuiiing hox'as weil as the ;.polish'rod. which are usuallyeniployed at the top of the wel which cause wear and area constant source as welfas increasine-the -Ir'ictional load. a Y

Still another object or the invention s to! provide an. elongated vertical housing or casing;

arranged to. be mounted axially above the 'well :5 pipe and having therein a piston cylinder so arranged as to contain the actuating liquid ime 1 from contactwith any oil: or :gas which mightviiowinto the housing. irornthe well pipe. even though such oilreaches-a considerable height in said housing.

A further object of-the invention is to provide a hydraulic jack including elements so constructed and-arranged that the loss or dislpe tion of the hydraulic fluid will be negligible and :5 only infrequent replenishing will be necessary.

A constructiondesigned to carry out the invention will be hereinafter described. together withother features of the invention.

The invention will he more readily understood (o from a reading of the'foliowing specification and bymeierence to the accompanying drawings in which an exampleoi. the invention-is shown. and

wherein:

:Figurel is a perspectiveview of a pump jack accordance with the invention and mounted on a well. is an enlarged vertical sectional-view of the uppenportion-of the-"pump' rod lifting structurew Figure 3 is a vertical se portion thereof.

ctional view of the lower Figure 4- is a vertical sectional view taken on the line 4-4 oi Fmure 2-,

Flgfire 5 is a horizontal cross-sectional view 65 taken'on the line 5-5 or Figure 4,

Figure 6 is a horizontal cross-sectional view taken on the line 6-6 oi'l lgure i. the pipe being shown in plan.

Figure 'lis a viewot the-powermember oi the jack. portions being shown in planv and'portions in longitudinalsection,

Figure 8 is a side elevation of the'same'. and

Figure 9 is an enlarged horizontal OIOSS$O- tional view taken on the line 9-9 of Figure 'I.

This application is-flled as a continuation in part of my iorm'er. application tiled June 16.

1932 Serial No. 617.519. now abandoned.

' In the drawings the numeral 10 designates an elongated upright cylindrical casing or housing forming part of the rod lifting. member of the Jack- The upper end of the houslng'is provided with-a cap 11 having an eye 12 or receiving a; hoist connection when it is desired to liit or support the cylinder. The lower end of the housin: is supported in a cap 13 having areduced 76 screw-threaded nipple 14,-which latter is screwed into a union it. The union. is screwed onto a nipple 16 mounted in a 1 connection 17, which in turn issecuredin the top of the casing hear. 18. which latter is mounted on the well casing in the usual manner.

By this arrangementthe housing 10 is rigidly supported in an upright position. It is pointed out that not only is the-usual stumng box eliminated, but the polish rod now in common use is absolutely dispensed with and all of the maintenance. wear and troubleresillting from the use 0! smiling boxes and polish rods are overcome. Whenever it is desired 'to disconnect the, housing 10;.lt ismerely necessary to unfasten the union is and lift the housing by its eye 12.

The housing is split at its center portion and the upper and lower members are screwed into a coupling collar lawhlch is shown in detail in Figure 4. This coupling hasa transverse web. 20. which is provided with araclial hollow 21 and an axial integral collar 22 on its upper side. The collar and the boss communicateand afluld conducting pipe 231s screwed into the outer end 0! the boss. A reduced piston cylinder 24 Fleur-cs2 and 4) has its lower" end screwed into the collar 22. while its upper end is open. A piston rod 25 extends down into. the cylinder and carries .a piston head 26 made up of 9. p312 rallty 0i inverted flexible cups 2?. 3

A crosshead 28 is fastened cn'iza upper end of the piston rod and bridle rods, 25 extend downwardly on each side of the cylinder. These rods pass through guides 30 in the web 20 and are connected at their lower ends to a lower crosshousing and loosely through the parts 13 tom inclusive, into the well casing in the usual manner.

It will be seen that when a fluid. such as oil, is forced into the cylinder 24, the piston 26 will lie-elevated. thus lifting the pump rod 34. A discharge pipe 35. as shown in Figure 1. extends from the T connection I! so that the oil which is lifted by the pump (not shownl-wlli be discharged through this pipe. Surplus oil may flow up into the lower section of the housing l and it is improbable that it would ever reach the web 20, but even it it did, it would not interiere with the operation of the jack.

The actuating member of the jack includes a horizontal cylinder 36, which is shown in detail in'Figures I, 8 and 9.- The cylinder is provided at one end witha head 3'1 having an integral elbow 38. An upright pipe 89 has its lower end screwed into the elbow. while its upper end is connected to the pipe 23 by an elbow to. A suitable iniection valve 41 is connected in the pipe 39, and when necessary additional liquid may be forced into the line through this valve.

The cylinder 36 has a collar 42 on its rear end and this end my be open. thus doing away with a stulhng box. A yoke 43 has its e'nds secured in cars 44 integral with the collar 42 and this yoke is engaged with a hook inserted in a post 46 secured in the ground. tar-otherwise rigidly supported. By this arrangement thecylinder 36 is anchored and said cylinder may also rest upon any suitable support. as a block 4'1.

piston rod 48 enters the open end of the cylinder and has thereon a piston head 49, including a plurality of ilexible 'cups 50 similar to the piston 26. These cups are disposed with their open aides toward-the oil in the cylinder, which is located between the piston andthe head 37. It is important to maintain a solid body oi all between the-pistons 2a and 49. oil being 'substan-, tially non-compressible. it is obvious that when one piston is mov the displacement of the oil will cause the other piston to be likewme moved. The invention is not to be limited to'thc use of pi]. as any other liquid or fluid suitable ior the purp y be pl y d On the outer end of the piston 48, I fasten a crosshead-Sl, which is connected with a crosshead 52 by bridle rods 53 liaising through guides Months ooiiarflandeimllarguidesoponthe head-87. The crosshead 52 carries an eye 56 for Mrecoivmg the book 5'! oi the pumping powerpuli The operation is as 'iollows:

when the pumping power (not shown) pulls the rod 58. the reciprocating member or carriage, termed by'the heads 51 and 52 and the rods 53. is slid forwardly. whereby the piston 59 is moved inwardly or iorwardly in the cylinder 36 by means of the piston rod 48.,1his iorward rnovement oi the piston 49 displaces the oil from the cylinder 36 and imparts motion to the oil standing in the pipes 39 and 23 and the cylinder 24 in the housing 10. As the iorward movement of the piston 4.9 continues, the movement 01 the oil is likewise continued, whereby the piston 26 is moved upwardly or elevated in the cylinder 24.

The lilting action which has been descr'bed elevates the carriage or lifting member formed bythe heads 28 and 31 and the. rods 29. whereby the pump rod 84 is elevated or liited. when the pump rod 34 is liited, the pump (not shown) down in the well'is operated and the oil or water in the well is thus lifted. The lifted oil flows out through the pipe 35 in the usual manner. It will be seen that a long stroke or lift oi the pump rod may be obtained and this is controlled by the length of the cylinders 24 and 36, as well as the travel oi the'rod 58. The relative diameters of the cylinders 24 and 86 would also control the stroke, by controlling the displacement oi the liquid fromone to the other. 7

When the pull on the rod 88 is relieved, the weight at the pump-rod 34, which extends the length or the well, will cause it to drop, thus pulling the piston 26 downwardly by reason 01" the crosshead and bridle rod connections. This will displace the oil in the cylinder 24 and impart a reverse movement to the oil in the pipes 23 and- 39 and the cylinder 36. whereby the pisston 49 will be driven rearwardly to its position for starting another cycle of operation.

When the piston 49 is moved rearwardiy. the pull rod 48 will belikewise moved by the crosshead and bridle rod connections, thus taking up the slack in the rod. The oil in travelling from the cylinder 24 throu h the pipes 23 and Sit-will be somewhat retarded in its How. and, therefore, the descent of the piston 28 will be gradual rather than sudden. This will cushion the down stroke oi the pump rods and save them irom injury, as wteil as providing a more. even and regular opera ion.

Whilel have shown the housing 10 as an enclosed cylinder. the invention is not to be limited to such, as any support suitable torthe pulp-.se and adapted to receive liquid at its lower end could be used. Also any hydraulic means for ac- 45 tuating the piston 26 could be employed so long as liquid was introduced into the cylinder 24 to elevate-the piston and exhausted therefrom to lower'said piston. The nipple i4- and the connections l5, l6. l7 and 18, or the like, are imup portant as they are large enough'to permit the tree upward passage of the pump rod 24 as well as surplus liquid. thereby eliminating a stufllng boxandttieusualpoiishrod The description which has been given, recites more or less detail of a particular embodiment of the invention, which is set torth as new and useiul, however, I desire it understood that the invention is not limited to suchexact details of construction. because it is manifest that changes V p 3 1. In a hydraulic lack. an enclosed upright housing mounted -on the upper end oi a welland connected to the well tubing, the tubing and housing being in vopen communication, a cylinder mounted in the housing, a piston reciprocating in the cylinden a piston rod extending; from the piston, means .ior connecting the piston rod with the pump rods 0! the well, an'snt'uating cylinder.

a piston operating in the actuating cylinder, a liquid conductor between the cylinders, means for sustaining the actuating cylinder; and a pull rod connection connected with the piston oi the actuating cylinder.

2. In a'hydraulic lack. an enclosed upright housing, a cylinder supported in'the housing, 8. l5(

piston working in said cylinder, a rod carriage connected with said piston, an actuating cylinder, a liquid conductor connecting said cylinders, a piston ,working in the actuating cylinder, and a pull rod connection attached to said piston.

13. In a hydraulic jack, an enclosed upri t housing having a well connection at its lower end. a cylinder mounted in the housing, a rod carriage mounted to reciprocate in the housing. a piston mounted in the cylinder and connected with the rod carriage. and hydraulic actuating means disposed exteriorly of the housing and connected with the cylinder for actuating the piston therein,

4. In a hydraulic jack, an enclosed upright housing having a well connection at its lower end, a cylinder mounted in the housing, a rod carriage mounted to reciprocate in the housing. a piston mounted in the cylinder and connected with the rod carriage, an actuating cylinder, a liquid conductor between the actuating cylinder and the cylinder in the housing, a piston working in the actuating cylinder, and a carriage connected with the actuating piston and having means for connecting with a pumping power pull rod.

5. In a hydraulic jack, an enclosed upright housing having a connection at its lower end for mounting on a well and loosely receiving the pump rod, hydraulic means within the cylinder for connection with the pump rod arranged to elevate said rod and to cushion the down stroke thereof, and hydraulic actuating means mounted exteriorly of the housing and connected with the hydraulic means thereof.

6. In a hydraulic jack, an upright housing for containing a liquid at its lower portion, a connection at the bottom of the housing for mounting it on a well and open for admitting liquid to the housing. a cylinder disposed vertically in the housing and having its upper end open, a piston disposed in the cylinder, a piston rod extending from the piston upwardly through the open end of the cylinder, 2. rod carriage mounted to reciprocate in the housing and connected with the piston rod, a liquid conductor connected with the lower end of the cylinder and means for forcing a liquid through the conductor to the cylinder and for draining said liquid from said cylinder.

7. In a hydraulic jack, an enclosed upright housing for mounting on a'well, a support in the housing at the midportion thereof, a vertical cylinder in the upper portion of the housing carried by said support, a piston working in the cylinder, a rod carriage mounted to reciprocate in the housing and connected with the piston, a liquid conductor connected with the lower end of the cylinder, an actuator for forcing liquid through said conductor and for permitting liquid to drain through said conductor, and means for connecting said actuator with a pumping power pull rod.

8. In a hydraulic jack, an upright cylindrical housing, a cap secured on the lower end of the housing and provided with a reduced nipple, means for connecting the nipple with the tubing of a well for providing an unobstructed overfiow of the liquid into the lower end of the housing, the nipple and connections being of such size as to permit a free and unrestricted upward passage of the pump rod into the housing, an upright cylinder mounted in the housing, a piston working in the cylinder, a carriage connected with the piston, means for connecting the carriage with a pump rod within the housing, a pipe connection extending from the cylinder outwardly through the housing, and a hydraulic actuator connected with the pipe connection for actuating the piston.

9. In a hydraulic jack, an upright cylindrical housing including upper and lower sections and a collar receiving said sections, a transverse support in the collar between the sections, a cylinder carried by the support and extending upwardly in the upper section of the housing, a pipe entering the collar and communicating with the cylinder through said support, a piston mounted in the cylinder, a piston rod extending upwardly from the piston and projecting from the cylinder, a cross head carried by the piston rod, bridle rods depending from the crosshead through the sup\ port of the collar and into the lower section of the housing, a bottom crosshead connected to the bridle rods, a stub carried by the bottom crosshead having means for attaching to a pump rod, and a hydraulic actuator connected with the pipe.

10. In a hydraulic jack, an enclosed upright housing having a connection at its lower end for mounting on a well and loosely receiving a pump rod, an upright cylinder mounted in the housing, an elongated piston working in the cylinder and including a plurality of longitudinally spaced packing elements engaging the wall of the cylinder, a piston rod extending from the piston and also extending from the cylinder within the housing, a rod carrier mounted in the housing and connected with the piston rod, and hydraulic actuating means connected with the cylinder.

11. In a hydraulic jack, a coupling collar having a transverse web and internally screw-threaded on each side of the web, the web having a liquid passage therethrough, an upright cylinder having its lower end mounted in the web and open to the passage thereof, housing sections screwed into the opposite ends of the collar, a piston mounted in the cylinder, a rod carrier slidable through the web and connected with the piston, and means for supplying a liquid under pressure to the passage of the web.

12. In a hydraulic jack, an upright support rigidly mounted on the upper end of a well and open to receive liquid from the well, an upright cylinder carried by the support, a piston working in said cylinder, a rod carrier in the support connected with the piston and having means for attaching to a pump rod extending from the well into the support, and means for supplying and withdrawing a liquid from the cylinder to operate the piston.

13. In a hydraulic jack, an upright support rigidly mounted on the upper end of a well and open to receive liquid from the well, an upright cylinder carried by the support, a piston working in said cylinder, a rod carrier in the support connected with the piston and having means for attaching to a pump rod extending from the well into the support, a hydraulic cylinder, a piston working in the hydraulic cylinder. a liquid conductor connecting the cylinders for conveying liquid from one cylinder to the other cylinder between their pistons, and means for connecting the piston of the hydraulic cylinder with a pumping power pull rod.

RICHARD D. HILL.

Ltd 

